20863440

素因数分解:

$2^4\times 3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{743}}^1$

素因数の和:778

約数の個数: 160

約数和(自身を含む): 77495040

約数和(自身を除く): 56631600

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 18, 20, 24, 26, 27, 30, 36, 39, 40, 45, 48, 52, 54, 60, 65, 72, 78, 80, 90, 104, 108, 117, 120, 130, 135, 144, 156, 180, 195, 208, 216, 234, 240, 260, 270, 312, 351, 360, 390, 432, 468, 520, 540, 585, 624, 702, 720, 743, 780, 936, 1040, 1080, 1170, 1404, 1486, 1560, 1755, 1872, 2160, 2229, 2340, 2808, 2972, 3120, 3510, 3715, 4458, 4680, 5616, 5944, 6687, 7020, 7430, 8916, 9360, 9659, 11145, 11888, 13374, 14040, 14860, 17832, 19318, 20061, 22290, 26748, 28080, 28977, 29720, 33435, 35664, 38636, 40122, 44580, 48295, 53496, 57954, 59440, 66870, 77272, 80244, 86931, 89160, 96590, 100305, 106992, 115908, 133740, 144885, 154544, 160488, 173862, 178320, 193180, 200610, 231816, 260793, 267480, 289770, 320976, 347724, 386360, 401220, 434655, 463632, 521586, 534960, 579540, 695448, 772720, 802440, 869310, 1043172, 1159080, 1303965, 1390896, 1604880, 1738620, 2086344, 2318160, 2607930, 3477240, 4172688, 5215860, 6954480, 10431720, 20863440]

約数ペア:

[(1, 20863440), (2, 10431720), (3, 6954480), (4, 5215860), (5, 4172688), (6, 3477240), (8, 2607930), (9, 2318160), (10, 2086344), (12, 1738620), (13, 1604880), (15, 1390896), (16, 1303965), (18, 1159080), (20, 1043172), (24, 869310), (26, 802440), (27, 772720), (30, 695448), (36, 579540), (39, 534960), (40, 521586), (45, 463632), (48, 434655), (52, 401220), (54, 386360), (60, 347724), (65, 320976), (72, 289770), (78, 267480), (80, 260793), (90, 231816), (104, 200610), (108, 193180), (117, 178320), (120, 173862), (130, 160488), (135, 154544), (144, 144885), (156, 133740), (180, 115908), (195, 106992), (208, 100305), (216, 96590), (234, 89160), (240, 86931), (260, 80244), (270, 77272), (312, 66870), (351, 59440), (360, 57954), (390, 53496), (432, 48295), (468, 44580), (520, 40122), (540, 38636), (585, 35664), (624, 33435), (702, 29720), (720, 28977), (743, 28080), (780, 26748), (936, 22290), (1040, 20061), (1080, 19318), (1170, 17832), (1404, 14860), (1486, 14040), (1560, 13374), (1755, 11888), (1872, 11145), (2160, 9659), (2229, 9360), (2340, 8916), (2808, 7430), (2972, 7020), (3120, 6687), (3510, 5944), (3715, 5616), (4458, 4680)]