21405510

素因数分解:

$2^1\times 3^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{557}}^1$

素因数の和:638

約数の個数: 96

約数和(自身を含む): 64763712

約数和(自身を除く): 43358202

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 30, 35, 42, 45, 61, 63, 70, 90, 105, 122, 126, 183, 210, 305, 315, 366, 427, 549, 557, 610, 630, 854, 915, 1098, 1114, 1281, 1671, 1830, 2135, 2562, 2745, 2785, 3342, 3843, 3899, 4270, 5013, 5490, 5570, 6405, 7686, 7798, 8355, 10026, 11697, 12810, 16710, 19215, 19495, 23394, 25065, 33977, 35091, 38430, 38990, 50130, 58485, 67954, 70182, 101931, 116970, 169885, 175455, 203862, 237839, 305793, 339770, 350910, 475678, 509655, 611586, 713517, 1019310, 1189195, 1427034, 1528965, 2140551, 2378390, 3057930, 3567585, 4281102, 7135170, 10702755, 21405510]

約数ペア:

[(1, 21405510), (2, 10702755), (3, 7135170), (5, 4281102), (6, 3567585), (7, 3057930), (9, 2378390), (10, 2140551), (14, 1528965), (15, 1427034), (18, 1189195), (21, 1019310), (30, 713517), (35, 611586), (42, 509655), (45, 475678), (61, 350910), (63, 339770), (70, 305793), (90, 237839), (105, 203862), (122, 175455), (126, 169885), (183, 116970), (210, 101931), (305, 70182), (315, 67954), (366, 58485), (427, 50130), (549, 38990), (557, 38430), (610, 35091), (630, 33977), (854, 25065), (915, 23394), (1098, 19495), (1114, 19215), (1281, 16710), (1671, 12810), (1830, 11697), (2135, 10026), (2562, 8355), (2745, 7798), (2785, 7686), (3342, 6405), (3843, 5570), (3899, 5490), (4270, 5013)]