21495480

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{257}}^1$

素因数の和:329

約数の個数: 128

約数和(自身を含む): 70217280

約数和(自身を除く): 48721800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 30, 34, 40, 41, 51, 60, 68, 82, 85, 102, 120, 123, 136, 164, 170, 204, 205, 246, 255, 257, 328, 340, 408, 410, 492, 510, 514, 615, 680, 697, 771, 820, 984, 1020, 1028, 1230, 1285, 1394, 1542, 1640, 2040, 2056, 2091, 2460, 2570, 2788, 3084, 3485, 3855, 4182, 4369, 4920, 5140, 5576, 6168, 6970, 7710, 8364, 8738, 10280, 10455, 10537, 13107, 13940, 15420, 16728, 17476, 20910, 21074, 21845, 26214, 27880, 30840, 31611, 34952, 41820, 42148, 43690, 52428, 52685, 63222, 65535, 83640, 84296, 87380, 104856, 105370, 126444, 131070, 158055, 174760, 179129, 210740, 252888, 262140, 316110, 358258, 421480, 524280, 537387, 632220, 716516, 895645, 1074774, 1264440, 1433032, 1791290, 2149548, 2686935, 3582580, 4299096, 5373870, 7165160, 10747740, 21495480]

約数ペア:

[(1, 21495480), (2, 10747740), (3, 7165160), (4, 5373870), (5, 4299096), (6, 3582580), (8, 2686935), (10, 2149548), (12, 1791290), (15, 1433032), (17, 1264440), (20, 1074774), (24, 895645), (30, 716516), (34, 632220), (40, 537387), (41, 524280), (51, 421480), (60, 358258), (68, 316110), (82, 262140), (85, 252888), (102, 210740), (120, 179129), (123, 174760), (136, 158055), (164, 131070), (170, 126444), (204, 105370), (205, 104856), (246, 87380), (255, 84296), (257, 83640), (328, 65535), (340, 63222), (408, 52685), (410, 52428), (492, 43690), (510, 42148), (514, 41820), (615, 34952), (680, 31611), (697, 30840), (771, 27880), (820, 26214), (984, 21845), (1020, 21074), (1028, 20910), (1230, 17476), (1285, 16728), (1394, 15420), (1542, 13940), (1640, 13107), (2040, 10537), (2056, 10455), (2091, 10280), (2460, 8738), (2570, 8364), (2788, 7710), (3084, 6970), (3485, 6168), (3855, 5576), (4182, 5140), (4369, 4920)]