20735780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{461}}^1$

素因数の和:656

約数の個数: 48

約数和(自身を含む): 47268144

約数和(自身を除く): 26532364

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 173, 260, 346, 461, 692, 865, 922, 1730, 1844, 2249, 2305, 3460, 4498, 4610, 5993, 8996, 9220, 11245, 11986, 22490, 23972, 29965, 44980, 59930, 79753, 119860, 159506, 319012, 398765, 797530, 1036789, 1595060, 2073578, 4147156, 5183945, 10367890, 20735780]

約数ペア:

[(1, 20735780), (2, 10367890), (4, 5183945), (5, 4147156), (10, 2073578), (13, 1595060), (20, 1036789), (26, 797530), (52, 398765), (65, 319012), (130, 159506), (173, 119860), (260, 79753), (346, 59930), (461, 44980), (692, 29965), (865, 23972), (922, 22490), (1730, 11986), (1844, 11245), (2249, 9220), (2305, 8996), (3460, 5993), (4498, 4610)]