638820

素因数分解:

$2^2\times 3^3\times 5^1\times 7^1\times {\mathrm{13}}^2$

素因数の和:51

約数の個数: 144

約数和(自身を含む): 2459520

約数和(自身を除く): 1820700

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14, 15, 18, 20, 21, 26, 27, 28, 30, 35, 36, 39, 42, 45, 52, 54, 60, 63, 65, 70, 78, 84, 90, 91, 105, 108, 117, 126, 130, 135, 140, 156, 169, 180, 182, 189, 195, 210, 234, 252, 260, 270, 273, 315, 338, 351, 364, 378, 390, 420, 455, 468, 507, 540, 546, 585, 630, 676, 702, 756, 780, 819, 845, 910, 945, 1014, 1092, 1170, 1183, 1260, 1365, 1404, 1521, 1638, 1690, 1755, 1820, 1890, 2028, 2340, 2366, 2457, 2535, 2730, 3042, 3276, 3380, 3510, 3549, 3780, 4095, 4563, 4732, 4914, 5070, 5460, 5915, 6084, 7020, 7098, 7605, 8190, 9126, 9828, 10140, 10647, 11830, 12285, 14196, 15210, 16380, 17745, 18252, 21294, 22815, 23660, 24570, 30420, 31941, 35490, 42588, 45630, 49140, 53235, 63882, 70980, 91260, 106470, 127764, 159705, 212940, 319410, 638820]

約数ペア:

[(1, 638820), (2, 319410), (3, 212940), (4, 159705), (5, 127764), (6, 106470), (7, 91260), (9, 70980), (10, 63882), (12, 53235), (13, 49140), (14, 45630), (15, 42588), (18, 35490), (20, 31941), (21, 30420), (26, 24570), (27, 23660), (28, 22815), (30, 21294), (35, 18252), (36, 17745), (39, 16380), (42, 15210), (45, 14196), (52, 12285), (54, 11830), (60, 10647), (63, 10140), (65, 9828), (70, 9126), (78, 8190), (84, 7605), (90, 7098), (91, 7020), (105, 6084), (108, 5915), (117, 5460), (126, 5070), (130, 4914), (135, 4732), (140, 4563), (156, 4095), (169, 3780), (180, 3549), (182, 3510), (189, 3380), (195, 3276), (210, 3042), (234, 2730), (252, 2535), (260, 2457), (270, 2366), (273, 2340), (315, 2028), (338, 1890), (351, 1820), (364, 1755), (378, 1690), (390, 1638), (420, 1521), (455, 1404), (468, 1365), (507, 1260), (540, 1183), (546, 1170), (585, 1092), (630, 1014), (676, 945), (702, 910), (756, 845), (780, 819)]