20485420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:143

約数の個数: 96

約数和(自身を含む): 49029120

約数和(自身を除く): 28543700

約数列:

[1, 2, 4, 5, 10, 19, 20, 31, 37, 38, 47, 62, 74, 76, 94, 95, 124, 148, 155, 185, 188, 190, 235, 310, 370, 380, 470, 589, 620, 703, 740, 893, 940, 1147, 1178, 1406, 1457, 1739, 1786, 2294, 2356, 2812, 2914, 2945, 3478, 3515, 3572, 4465, 4588, 5735, 5828, 5890, 6956, 7030, 7285, 8695, 8930, 11470, 11780, 14060, 14570, 17390, 17860, 21793, 22940, 27683, 29140, 33041, 34780, 43586, 53909, 55366, 66082, 87172, 107818, 108965, 110732, 132164, 138415, 165205, 215636, 217930, 269545, 276830, 330410, 435860, 539090, 553660, 660820, 1024271, 1078180, 2048542, 4097084, 5121355, 10242710, 20485420]

約数ペア:

[(1, 20485420), (2, 10242710), (4, 5121355), (5, 4097084), (10, 2048542), (19, 1078180), (20, 1024271), (31, 660820), (37, 553660), (38, 539090), (47, 435860), (62, 330410), (74, 276830), (76, 269545), (94, 217930), (95, 215636), (124, 165205), (148, 138415), (155, 132164), (185, 110732), (188, 108965), (190, 107818), (235, 87172), (310, 66082), (370, 55366), (380, 53909), (470, 43586), (589, 34780), (620, 33041), (703, 29140), (740, 27683), (893, 22940), (940, 21793), (1147, 17860), (1178, 17390), (1406, 14570), (1457, 14060), (1739, 11780), (1786, 11470), (2294, 8930), (2356, 8695), (2812, 7285), (2914, 7030), (2945, 6956), (3478, 5890), (3515, 5828), (3572, 5735), (4465, 4588)]