21617180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:159

約数の個数: 96

約数和(自身を含む): 52496640

約数和(自身を除く): 30879460

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 29, 47, 52, 58, 61, 65, 94, 116, 122, 130, 145, 188, 235, 244, 260, 290, 305, 377, 470, 580, 610, 611, 754, 793, 940, 1220, 1222, 1363, 1508, 1586, 1769, 1885, 2444, 2726, 2867, 3055, 3172, 3538, 3770, 3965, 5452, 5734, 6110, 6815, 7076, 7540, 7930, 8845, 11468, 12220, 13630, 14335, 15860, 17690, 17719, 22997, 27260, 28670, 35380, 35438, 37271, 45994, 57340, 70876, 74542, 83143, 88595, 91988, 114985, 149084, 166286, 177190, 186355, 229970, 332572, 354380, 372710, 415715, 459940, 745420, 831430, 1080859, 1662860, 2161718, 4323436, 5404295, 10808590, 21617180]

約数ペア:

[(1, 21617180), (2, 10808590), (4, 5404295), (5, 4323436), (10, 2161718), (13, 1662860), (20, 1080859), (26, 831430), (29, 745420), (47, 459940), (52, 415715), (58, 372710), (61, 354380), (65, 332572), (94, 229970), (116, 186355), (122, 177190), (130, 166286), (145, 149084), (188, 114985), (235, 91988), (244, 88595), (260, 83143), (290, 74542), (305, 70876), (377, 57340), (470, 45994), (580, 37271), (610, 35438), (611, 35380), (754, 28670), (793, 27260), (940, 22997), (1220, 17719), (1222, 17690), (1363, 15860), (1508, 14335), (1586, 13630), (1769, 12220), (1885, 11468), (2444, 8845), (2726, 7930), (2867, 7540), (3055, 7076), (3172, 6815), (3538, 6110), (3770, 5734), (3965, 5452)]