21865870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:217

約数の個数: 64

約数和(自身を含む): 45287424

約数和(自身を除く): 23421554

約数列:

[1, 2, 5, 10, 13, 23, 26, 46, 65, 71, 103, 115, 130, 142, 206, 230, 299, 355, 515, 598, 710, 923, 1030, 1339, 1495, 1633, 1846, 2369, 2678, 2990, 3266, 4615, 4738, 6695, 7313, 8165, 9230, 11845, 13390, 14626, 16330, 21229, 23690, 30797, 36565, 42458, 61594, 73130, 95069, 106145, 153985, 168199, 190138, 212290, 307970, 336398, 475345, 840995, 950690, 1681990, 2186587, 4373174, 10932935, 21865870]

約数ペア:

[(1, 21865870), (2, 10932935), (5, 4373174), (10, 2186587), (13, 1681990), (23, 950690), (26, 840995), (46, 475345), (65, 336398), (71, 307970), (103, 212290), (115, 190138), (130, 168199), (142, 153985), (206, 106145), (230, 95069), (299, 73130), (355, 61594), (515, 42458), (598, 36565), (710, 30797), (923, 23690), (1030, 21229), (1339, 16330), (1495, 14626), (1633, 13390), (1846, 11845), (2369, 9230), (2678, 8165), (2990, 7313), (3266, 6695), (4615, 4738)]