19724120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{457}}^1$

素因数の和:564

約数の個数: 64

約数和(自身を含む): 48474720

約数和(自身を除く): 28750600

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 83, 104, 130, 166, 260, 332, 415, 457, 520, 664, 830, 914, 1079, 1660, 1828, 2158, 2285, 3320, 3656, 4316, 4570, 5395, 5941, 8632, 9140, 10790, 11882, 18280, 21580, 23764, 29705, 37931, 43160, 47528, 59410, 75862, 118820, 151724, 189655, 237640, 303448, 379310, 493103, 758620, 986206, 1517240, 1972412, 2465515, 3944824, 4931030, 9862060, 19724120]

約数ペア:

[(1, 19724120), (2, 9862060), (4, 4931030), (5, 3944824), (8, 2465515), (10, 1972412), (13, 1517240), (20, 986206), (26, 758620), (40, 493103), (52, 379310), (65, 303448), (83, 237640), (104, 189655), (130, 151724), (166, 118820), (260, 75862), (332, 59410), (415, 47528), (457, 43160), (520, 37931), (664, 29705), (830, 23764), (914, 21580), (1079, 18280), (1660, 11882), (1828, 10790), (2158, 9140), (2285, 8632), (3320, 5941), (3656, 5395), (4316, 4570)]