18905120

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:238

約数の個数: 96

約数和(自身を含む): 49215600

約数和(自身を除く): 30310480

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 61, 65, 80, 104, 122, 130, 149, 160, 208, 244, 260, 298, 305, 416, 488, 520, 596, 610, 745, 793, 976, 1040, 1192, 1220, 1490, 1586, 1937, 1952, 2080, 2384, 2440, 2980, 3172, 3874, 3965, 4768, 4880, 5960, 6344, 7748, 7930, 9089, 9685, 9760, 11920, 12688, 15496, 15860, 18178, 19370, 23840, 25376, 30992, 31720, 36356, 38740, 45445, 61984, 63440, 72712, 77480, 90890, 118157, 126880, 145424, 154960, 181780, 236314, 290848, 309920, 363560, 472628, 590785, 727120, 945256, 1181570, 1454240, 1890512, 2363140, 3781024, 4726280, 9452560, 18905120]

約数ペア:

[(1, 18905120), (2, 9452560), (4, 4726280), (5, 3781024), (8, 2363140), (10, 1890512), (13, 1454240), (16, 1181570), (20, 945256), (26, 727120), (32, 590785), (40, 472628), (52, 363560), (61, 309920), (65, 290848), (80, 236314), (104, 181780), (122, 154960), (130, 145424), (149, 126880), (160, 118157), (208, 90890), (244, 77480), (260, 72712), (298, 63440), (305, 61984), (416, 45445), (488, 38740), (520, 36356), (596, 31720), (610, 30992), (745, 25376), (793, 23840), (976, 19370), (1040, 18178), (1192, 15860), (1220, 15496), (1490, 12688), (1586, 11920), (1937, 9760), (1952, 9685), (2080, 9089), (2384, 7930), (2440, 7748), (2980, 6344), (3172, 5960), (3874, 4880), (3965, 4768)]