178994920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{344221}}^1$

素因数の和:344245

約数の個数: 32

約数和(自身を含む): 433719720

約数和(自身を除く): 254724800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 344221, 688442, 1376884, 1721105, 2753768, 3442210, 4474873, 6884420, 8949746, 13768840, 17899492, 22374365, 35798984, 44748730, 89497460, 178994920]

約数ペア:

[(1, 178994920), (2, 89497460), (4, 44748730), (5, 35798984), (8, 22374365), (10, 17899492), (13, 13768840), (20, 8949746), (26, 6884420), (40, 4474873), (52, 3442210), (65, 2753768), (104, 1721105), (130, 1376884), (260, 688442), (520, 344221)]