21879480

素因数分解:

$2^3\times 3^1\times 5^1\times 7^2\times {\mathrm{61}}^2$

素因数の和:150

約数の個数: 144

約数和(自身を含む): 77627160

約数和(自身を除く): 55747680

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 49, 56, 60, 61, 70, 84, 98, 105, 120, 122, 140, 147, 168, 183, 196, 210, 244, 245, 280, 294, 305, 366, 392, 420, 427, 488, 490, 588, 610, 732, 735, 840, 854, 915, 980, 1176, 1220, 1281, 1464, 1470, 1708, 1830, 1960, 2135, 2440, 2562, 2940, 2989, 3416, 3660, 3721, 4270, 5124, 5880, 5978, 6405, 7320, 7442, 8540, 8967, 10248, 11163, 11956, 12810, 14884, 14945, 17080, 17934, 18605, 22326, 23912, 25620, 26047, 29768, 29890, 35868, 37210, 44652, 44835, 51240, 52094, 55815, 59780, 71736, 74420, 78141, 89304, 89670, 104188, 111630, 119560, 130235, 148840, 156282, 179340, 182329, 208376, 223260, 260470, 312564, 358680, 364658, 390705, 446520, 520940, 546987, 625128, 729316, 781410, 911645, 1041880, 1093974, 1458632, 1562820, 1823290, 2187948, 2734935, 3125640, 3646580, 4375896, 5469870, 7293160, 10939740, 21879480]

約数ペア:

[(1, 21879480), (2, 10939740), (3, 7293160), (4, 5469870), (5, 4375896), (6, 3646580), (7, 3125640), (8, 2734935), (10, 2187948), (12, 1823290), (14, 1562820), (15, 1458632), (20, 1093974), (21, 1041880), (24, 911645), (28, 781410), (30, 729316), (35, 625128), (40, 546987), (42, 520940), (49, 446520), (56, 390705), (60, 364658), (61, 358680), (70, 312564), (84, 260470), (98, 223260), (105, 208376), (120, 182329), (122, 179340), (140, 156282), (147, 148840), (168, 130235), (183, 119560), (196, 111630), (210, 104188), (244, 89670), (245, 89304), (280, 78141), (294, 74420), (305, 71736), (366, 59780), (392, 55815), (420, 52094), (427, 51240), (488, 44835), (490, 44652), (588, 37210), (610, 35868), (732, 29890), (735, 29768), (840, 26047), (854, 25620), (915, 23912), (980, 22326), (1176, 18605), (1220, 17934), (1281, 17080), (1464, 14945), (1470, 14884), (1708, 12810), (1830, 11956), (1960, 11163), (2135, 10248), (2440, 8967), (2562, 8540), (2940, 7442), (2989, 7320), (3416, 6405), (3660, 5978), (3721, 5880), (4270, 5124)]