21490149140

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{563}}^1\times {\mathrm{857}}^1$

素因数の和:1577

約数の個数: 96

約数和(自身を含む): 48290546304

約数和(自身を除く): 26800397164

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 131, 170, 262, 340, 524, 563, 655, 857, 1126, 1310, 1714, 2227, 2252, 2620, 2815, 3428, 4285, 4454, 5630, 8570, 8908, 9571, 11135, 11260, 14569, 17140, 19142, 22270, 29138, 38284, 44540, 47855, 58276, 72845, 73753, 95710, 112267, 145690, 147506, 191420, 224534, 291380, 295012, 368765, 449068, 482491, 561335, 737530, 964982, 1122670, 1253801, 1475060, 1908539, 1929964, 2245340, 2412455, 2507602, 3817078, 4824910, 5015204, 6269005, 7634156, 8202347, 9542695, 9649820, 12538010, 16404694, 19085390, 25076020, 32809388, 38170780, 41011735, 63206321, 82023470, 126412642, 164046940, 252825284, 316031605, 632063210, 1074507457, 1264126420, 2149014914, 4298029828, 5372537285, 10745074570, 21490149140]

約数ペア:

[(1, 21490149140), (2, 10745074570), (4, 5372537285), (5, 4298029828), (10, 2149014914), (17, 1264126420), (20, 1074507457), (34, 632063210), (68, 316031605), (85, 252825284), (131, 164046940), (170, 126412642), (262, 82023470), (340, 63206321), (524, 41011735), (563, 38170780), (655, 32809388), (857, 25076020), (1126, 19085390), (1310, 16404694), (1714, 12538010), (2227, 9649820), (2252, 9542695), (2620, 8202347), (2815, 7634156), (3428, 6269005), (4285, 5015204), (4454, 4824910), (5630, 3817078), (8570, 2507602), (8908, 2412455), (9571, 2245340), (11135, 1929964), (11260, 1908539), (14569, 1475060), (17140, 1253801), (19142, 1122670), (22270, 964982), (29138, 737530), (38284, 561335), (44540, 482491), (47855, 449068), (58276, 368765), (72845, 295012), (73753, 291380), (95710, 224534), (112267, 191420), (145690, 147506)]