28691780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{523}}^1$

素因数の和:756

約数の個数: 48

約数和(自身を含む): 65319744

約数和(自身を除く): 36627964

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 211, 260, 422, 523, 844, 1046, 1055, 2092, 2110, 2615, 2743, 4220, 5230, 5486, 6799, 10460, 10972, 13598, 13715, 27196, 27430, 33995, 54860, 67990, 110353, 135980, 220706, 441412, 551765, 1103530, 1434589, 2207060, 2869178, 5738356, 7172945, 14345890, 28691780]

約数ペア:

[(1, 28691780), (2, 14345890), (4, 7172945), (5, 5738356), (10, 2869178), (13, 2207060), (20, 1434589), (26, 1103530), (52, 551765), (65, 441412), (130, 220706), (211, 135980), (260, 110353), (422, 67990), (523, 54860), (844, 33995), (1046, 27430), (1055, 27196), (2092, 13715), (2110, 13598), (2615, 10972), (2743, 10460), (4220, 6799), (5230, 5486)]