18359780

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1\times {\mathrm{149}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 39841200

約数和(自身を除く): 21481420

約数列:

[1, 2, 4, 5, 10, 20, 61, 101, 122, 149, 202, 244, 298, 305, 404, 505, 596, 610, 745, 1010, 1220, 1490, 2020, 2980, 6161, 9089, 12322, 15049, 18178, 24644, 30098, 30805, 36356, 45445, 60196, 61610, 75245, 90890, 123220, 150490, 181780, 300980, 917989, 1835978, 3671956, 4589945, 9179890, 18359780]

約数ペア:

[(1, 18359780), (2, 9179890), (4, 4589945), (5, 3671956), (10, 1835978), (20, 917989), (61, 300980), (101, 181780), (122, 150490), (149, 123220), (202, 90890), (244, 75245), (298, 61610), (305, 60196), (404, 45445), (505, 36356), (596, 30805), (610, 30098), (745, 24644), (1010, 18178), (1220, 15049), (1490, 12322), (2020, 9089), (2980, 6161)]