20894640

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{181}}^1$

素因数の和:247

約数の個数: 160

約数和(自身を含む): 72037056

約数和(自身を除く): 51142416

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 37, 39, 40, 48, 52, 60, 65, 74, 78, 80, 104, 111, 120, 130, 148, 156, 181, 185, 195, 208, 222, 240, 260, 296, 312, 362, 370, 390, 444, 481, 520, 543, 555, 592, 624, 724, 740, 780, 888, 905, 962, 1040, 1086, 1110, 1443, 1448, 1480, 1560, 1776, 1810, 1924, 2172, 2220, 2353, 2405, 2715, 2886, 2896, 2960, 3120, 3620, 3848, 4344, 4440, 4706, 4810, 5430, 5772, 6697, 7059, 7215, 7240, 7696, 8688, 8880, 9412, 9620, 10860, 11544, 11765, 13394, 14118, 14430, 14480, 18824, 19240, 20091, 21720, 23088, 23530, 26788, 28236, 28860, 33485, 35295, 37648, 38480, 40182, 43440, 47060, 53576, 56472, 57720, 66970, 70590, 80364, 87061, 94120, 100455, 107152, 112944, 115440, 133940, 141180, 160728, 174122, 188240, 200910, 261183, 267880, 282360, 321456, 348244, 401820, 435305, 522366, 535760, 564720, 696488, 803640, 870610, 1044732, 1305915, 1392976, 1607280, 1741220, 2089464, 2611830, 3482440, 4178928, 5223660, 6964880, 10447320, 20894640]

約数ペア:

[(1, 20894640), (2, 10447320), (3, 6964880), (4, 5223660), (5, 4178928), (6, 3482440), (8, 2611830), (10, 2089464), (12, 1741220), (13, 1607280), (15, 1392976), (16, 1305915), (20, 1044732), (24, 870610), (26, 803640), (30, 696488), (37, 564720), (39, 535760), (40, 522366), (48, 435305), (52, 401820), (60, 348244), (65, 321456), (74, 282360), (78, 267880), (80, 261183), (104, 200910), (111, 188240), (120, 174122), (130, 160728), (148, 141180), (156, 133940), (181, 115440), (185, 112944), (195, 107152), (208, 100455), (222, 94120), (240, 87061), (260, 80364), (296, 70590), (312, 66970), (362, 57720), (370, 56472), (390, 53576), (444, 47060), (481, 43440), (520, 40182), (543, 38480), (555, 37648), (592, 35295), (624, 33485), (724, 28860), (740, 28236), (780, 26788), (888, 23530), (905, 23088), (962, 21720), (1040, 20091), (1086, 19240), (1110, 18824), (1443, 14480), (1448, 14430), (1480, 14118), (1560, 13394), (1776, 11765), (1810, 11544), (1924, 10860), (2172, 9620), (2220, 9412), (2353, 8880), (2405, 8688), (2715, 7696), (2886, 7240), (2896, 7215), (2960, 7059), (3120, 6697), (3620, 5772), (3848, 5430), (4344, 4810), (4440, 4706)]