21757960

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{653}}^1$

素因数の和:695

約数の個数: 96

約数和(自身を含む): 60390360

約数和(自身を除く): 38632400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 28, 34, 35, 40, 49, 56, 68, 70, 85, 98, 119, 136, 140, 170, 196, 238, 245, 280, 340, 392, 476, 490, 595, 653, 680, 833, 952, 980, 1190, 1306, 1666, 1960, 2380, 2612, 3265, 3332, 4165, 4571, 4760, 5224, 6530, 6664, 8330, 9142, 11101, 13060, 16660, 18284, 22202, 22855, 26120, 31997, 33320, 36568, 44404, 45710, 55505, 63994, 77707, 88808, 91420, 111010, 127988, 155414, 159985, 182840, 222020, 255976, 310828, 319970, 388535, 444040, 543949, 621656, 639940, 777070, 1087898, 1279880, 1554140, 2175796, 2719745, 3108280, 4351592, 5439490, 10878980, 21757960]

約数ペア:

[(1, 21757960), (2, 10878980), (4, 5439490), (5, 4351592), (7, 3108280), (8, 2719745), (10, 2175796), (14, 1554140), (17, 1279880), (20, 1087898), (28, 777070), (34, 639940), (35, 621656), (40, 543949), (49, 444040), (56, 388535), (68, 319970), (70, 310828), (85, 255976), (98, 222020), (119, 182840), (136, 159985), (140, 155414), (170, 127988), (196, 111010), (238, 91420), (245, 88808), (280, 77707), (340, 63994), (392, 55505), (476, 45710), (490, 44404), (595, 36568), (653, 33320), (680, 31997), (833, 26120), (952, 22855), (980, 22202), (1190, 18284), (1306, 16660), (1666, 13060), (1960, 11101), (2380, 9142), (2612, 8330), (3265, 6664), (3332, 6530), (4165, 5224), (4571, 4760)]