20155010

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:171

約数の個数: 64

約数和(自身を含む): 40711680

約数和(自身を除く): 20556670

約数列:

[1, 2, 5, 10, 19, 37, 38, 47, 61, 74, 94, 95, 122, 185, 190, 235, 305, 370, 470, 610, 703, 893, 1159, 1406, 1739, 1786, 2257, 2318, 2867, 3478, 3515, 4465, 4514, 5734, 5795, 7030, 8695, 8930, 11285, 11590, 14335, 17390, 22570, 28670, 33041, 42883, 54473, 66082, 85766, 106079, 108946, 165205, 212158, 214415, 272365, 330410, 428830, 530395, 544730, 1060790, 2015501, 4031002, 10077505, 20155010]

約数ペア:

[(1, 20155010), (2, 10077505), (5, 4031002), (10, 2015501), (19, 1060790), (37, 544730), (38, 530395), (47, 428830), (61, 330410), (74, 272365), (94, 214415), (95, 212158), (122, 165205), (185, 108946), (190, 106079), (235, 85766), (305, 66082), (370, 54473), (470, 42883), (610, 33041), (703, 28670), (893, 22570), (1159, 17390), (1406, 14335), (1739, 11590), (1786, 11285), (2257, 8930), (2318, 8695), (2867, 7030), (3478, 5795), (3515, 5734), (4465, 4514)]