638525860

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{491}}^1\times {\mathrm{1327}}^1$

素因数の和:1841

約数の個数: 72

約数和(自身を含む): 1564182144

約数和(自身を除く): 925656284

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 491, 980, 982, 1327, 1964, 2455, 2654, 3437, 4910, 5308, 6635, 6874, 9289, 9820, 13270, 13748, 17185, 18578, 24059, 26540, 34370, 37156, 46445, 48118, 65023, 68740, 92890, 96236, 120295, 130046, 185780, 240590, 260092, 325115, 481180, 650230, 651557, 1300460, 1303114, 2606228, 3257785, 4560899, 6515570, 9121798, 13031140, 18243596, 22804495, 31926293, 45608990, 63852586, 91217980, 127705172, 159631465, 319262930, 638525860]

約数ペア:

[(1, 638525860), (2, 319262930), (4, 159631465), (5, 127705172), (7, 91217980), (10, 63852586), (14, 45608990), (20, 31926293), (28, 22804495), (35, 18243596), (49, 13031140), (70, 9121798), (98, 6515570), (140, 4560899), (196, 3257785), (245, 2606228), (490, 1303114), (491, 1300460), (980, 651557), (982, 650230), (1327, 481180), (1964, 325115), (2455, 260092), (2654, 240590), (3437, 185780), (4910, 130046), (5308, 120295), (6635, 96236), (6874, 92890), (9289, 68740), (9820, 65023), (13270, 48118), (13748, 46445), (17185, 37156), (18578, 34370), (24059, 26540)]