21461020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{359}}^1$

素因数の和:443

約数の個数: 72

約数和(自身を含む): 53434080

約数和(自身を除く): 31973060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 61, 70, 98, 122, 140, 196, 244, 245, 305, 359, 427, 490, 610, 718, 854, 980, 1220, 1436, 1708, 1795, 2135, 2513, 2989, 3590, 4270, 5026, 5978, 7180, 8540, 10052, 11956, 12565, 14945, 17591, 21899, 25130, 29890, 35182, 43798, 50260, 59780, 70364, 87596, 87955, 109495, 153293, 175910, 218990, 306586, 351820, 437980, 613172, 766465, 1073051, 1532930, 2146102, 3065860, 4292204, 5365255, 10730510, 21461020]

約数ペア:

[(1, 21461020), (2, 10730510), (4, 5365255), (5, 4292204), (7, 3065860), (10, 2146102), (14, 1532930), (20, 1073051), (28, 766465), (35, 613172), (49, 437980), (61, 351820), (70, 306586), (98, 218990), (122, 175910), (140, 153293), (196, 109495), (244, 87955), (245, 87596), (305, 70364), (359, 59780), (427, 50260), (490, 43798), (610, 35182), (718, 29890), (854, 25130), (980, 21899), (1220, 17591), (1436, 14945), (1708, 12565), (1795, 11956), (2135, 10052), (2513, 8540), (2989, 7180), (3590, 5978), (4270, 5026)]