19667960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{347}}^1$

素因数の和:480

約数の個数: 64

約数和(自身を含む): 48232800

約数和(自身を除く): 28564840

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 109, 130, 218, 260, 347, 436, 520, 545, 694, 872, 1090, 1388, 1417, 1735, 2180, 2776, 2834, 3470, 4360, 4511, 5668, 6940, 7085, 9022, 11336, 13880, 14170, 18044, 22555, 28340, 36088, 37823, 45110, 56680, 75646, 90220, 151292, 180440, 189115, 302584, 378230, 491699, 756460, 983398, 1512920, 1966796, 2458495, 3933592, 4916990, 9833980, 19667960]

約数ペア:

[(1, 19667960), (2, 9833980), (4, 4916990), (5, 3933592), (8, 2458495), (10, 1966796), (13, 1512920), (20, 983398), (26, 756460), (40, 491699), (52, 378230), (65, 302584), (104, 189115), (109, 180440), (130, 151292), (218, 90220), (260, 75646), (347, 56680), (436, 45110), (520, 37823), (545, 36088), (694, 28340), (872, 22555), (1090, 18044), (1388, 14170), (1417, 13880), (1735, 11336), (2180, 9022), (2776, 7085), (2834, 6940), (3470, 5668), (4360, 4511)]