20708220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{191}}^1$

素因数の和:355

約数の個数: 96

約数和(自身を含む): 63221760

約数和(自身を除く): 42513540

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 139, 156, 191, 195, 260, 278, 382, 390, 417, 556, 573, 695, 764, 780, 834, 955, 1146, 1390, 1668, 1807, 1910, 2085, 2292, 2483, 2780, 2865, 3614, 3820, 4170, 4966, 5421, 5730, 7228, 7449, 8340, 9035, 9932, 10842, 11460, 12415, 14898, 18070, 21684, 24830, 26549, 27105, 29796, 36140, 37245, 49660, 53098, 54210, 74490, 79647, 106196, 108420, 132745, 148980, 159294, 265490, 318588, 345137, 398235, 530980, 690274, 796470, 1035411, 1380548, 1592940, 1725685, 2070822, 3451370, 4141644, 5177055, 6902740, 10354110, 20708220]

約数ペア:

[(1, 20708220), (2, 10354110), (3, 6902740), (4, 5177055), (5, 4141644), (6, 3451370), (10, 2070822), (12, 1725685), (13, 1592940), (15, 1380548), (20, 1035411), (26, 796470), (30, 690274), (39, 530980), (52, 398235), (60, 345137), (65, 318588), (78, 265490), (130, 159294), (139, 148980), (156, 132745), (191, 108420), (195, 106196), (260, 79647), (278, 74490), (382, 54210), (390, 53098), (417, 49660), (556, 37245), (573, 36140), (695, 29796), (764, 27105), (780, 26549), (834, 24830), (955, 21684), (1146, 18070), (1390, 14898), (1668, 12415), (1807, 11460), (1910, 10842), (2085, 9932), (2292, 9035), (2483, 8340), (2780, 7449), (2865, 7228), (3614, 5730), (3820, 5421), (4170, 4966)]