21708440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{383}}^1$

素因数の和:516

約数の個数: 64

約数和(自身を含む): 53222400

約数和(自身を除く): 31513960

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 109, 130, 218, 260, 383, 436, 520, 545, 766, 872, 1090, 1417, 1532, 1915, 2180, 2834, 3064, 3830, 4360, 4979, 5668, 7085, 7660, 9958, 11336, 14170, 15320, 19916, 24895, 28340, 39832, 41747, 49790, 56680, 83494, 99580, 166988, 199160, 208735, 333976, 417470, 542711, 834940, 1085422, 1669880, 2170844, 2713555, 4341688, 5427110, 10854220, 21708440]

約数ペア:

[(1, 21708440), (2, 10854220), (4, 5427110), (5, 4341688), (8, 2713555), (10, 2170844), (13, 1669880), (20, 1085422), (26, 834940), (40, 542711), (52, 417470), (65, 333976), (104, 208735), (109, 199160), (130, 166988), (218, 99580), (260, 83494), (383, 56680), (436, 49790), (520, 41747), (545, 39832), (766, 28340), (872, 24895), (1090, 19916), (1417, 15320), (1532, 14170), (1915, 11336), (2180, 9958), (2834, 7660), (3064, 7085), (3830, 5668), (4360, 4979)]