13451720

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:258

約数の個数: 64

約数和(自身を含む): 31806000

約数和(自身を除く): 18354280

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 61, 74, 122, 148, 149, 185, 244, 296, 298, 305, 370, 488, 596, 610, 740, 745, 1192, 1220, 1480, 1490, 2257, 2440, 2980, 4514, 5513, 5960, 9028, 9089, 11026, 11285, 18056, 18178, 22052, 22570, 27565, 36356, 44104, 45140, 45445, 55130, 72712, 90280, 90890, 110260, 181780, 220520, 336293, 363560, 672586, 1345172, 1681465, 2690344, 3362930, 6725860, 13451720]

約数ペア:

[(1, 13451720), (2, 6725860), (4, 3362930), (5, 2690344), (8, 1681465), (10, 1345172), (20, 672586), (37, 363560), (40, 336293), (61, 220520), (74, 181780), (122, 110260), (148, 90890), (149, 90280), (185, 72712), (244, 55130), (296, 45445), (298, 45140), (305, 44104), (370, 36356), (488, 27565), (596, 22570), (610, 22052), (740, 18178), (745, 18056), (1192, 11285), (1220, 11026), (1480, 9089), (1490, 9028), (2257, 5960), (2440, 5513), (2980, 4514)]