20673280

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{521}}^1$

素因数の和:573

約数の個数: 72

約数和(自身を含む): 51214464

約数和(自身を除く): 30541184

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 521, 620, 640, 992, 1042, 1240, 1280, 1984, 2084, 2480, 2605, 3968, 4168, 4960, 5210, 7936, 8336, 9920, 10420, 16151, 16672, 19840, 20840, 32302, 33344, 39680, 41680, 64604, 66688, 80755, 83360, 129208, 133376, 161510, 166720, 258416, 323020, 333440, 516832, 646040, 666880, 1033664, 1292080, 2067328, 2584160, 4134656, 5168320, 10336640, 20673280]

約数ペア:

[(1, 20673280), (2, 10336640), (4, 5168320), (5, 4134656), (8, 2584160), (10, 2067328), (16, 1292080), (20, 1033664), (31, 666880), (32, 646040), (40, 516832), (62, 333440), (64, 323020), (80, 258416), (124, 166720), (128, 161510), (155, 133376), (160, 129208), (248, 83360), (256, 80755), (310, 66688), (320, 64604), (496, 41680), (521, 39680), (620, 33344), (640, 32302), (992, 20840), (1042, 19840), (1240, 16672), (1280, 16151), (1984, 10420), (2084, 9920), (2480, 8336), (2605, 7936), (3968, 5210), (4168, 4960)]