21143820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:235

約数の個数: 96

約数和(自身を含む): 61871040

約数和(自身を除く): 40727220

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 53, 60, 61, 106, 109, 122, 159, 183, 212, 218, 244, 265, 305, 318, 327, 366, 436, 530, 545, 610, 636, 654, 732, 795, 915, 1060, 1090, 1220, 1308, 1590, 1635, 1830, 2180, 3180, 3233, 3270, 3660, 5777, 6466, 6540, 6649, 9699, 11554, 12932, 13298, 16165, 17331, 19398, 19947, 23108, 26596, 28885, 32330, 33245, 34662, 38796, 39894, 48495, 57770, 64660, 66490, 69324, 79788, 86655, 96990, 99735, 115540, 132980, 173310, 193980, 199470, 346620, 352397, 398940, 704794, 1057191, 1409588, 1761985, 2114382, 3523970, 4228764, 5285955, 7047940, 10571910, 21143820]

約数ペア:

[(1, 21143820), (2, 10571910), (3, 7047940), (4, 5285955), (5, 4228764), (6, 3523970), (10, 2114382), (12, 1761985), (15, 1409588), (20, 1057191), (30, 704794), (53, 398940), (60, 352397), (61, 346620), (106, 199470), (109, 193980), (122, 173310), (159, 132980), (183, 115540), (212, 99735), (218, 96990), (244, 86655), (265, 79788), (305, 69324), (318, 66490), (327, 64660), (366, 57770), (436, 48495), (530, 39894), (545, 38796), (610, 34662), (636, 33245), (654, 32330), (732, 28885), (795, 26596), (915, 23108), (1060, 19947), (1090, 19398), (1220, 17331), (1308, 16165), (1590, 13298), (1635, 12932), (1830, 11554), (2180, 9699), (3180, 6649), (3233, 6540), (3270, 6466), (3660, 5777)]