18883160

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1$

素因数の和:252

約数の個数: 64

約数和(自身を含む): 44193600

約数和(自身を除く): 25310440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 71, 109, 122, 142, 218, 244, 284, 305, 355, 436, 488, 545, 568, 610, 710, 872, 1090, 1220, 1420, 2180, 2440, 2840, 4331, 4360, 6649, 7739, 8662, 13298, 15478, 17324, 21655, 26596, 30956, 33245, 34648, 38695, 43310, 53192, 61912, 66490, 77390, 86620, 132980, 154780, 173240, 265960, 309560, 472079, 944158, 1888316, 2360395, 3776632, 4720790, 9441580, 18883160]

約数ペア:

[(1, 18883160), (2, 9441580), (4, 4720790), (5, 3776632), (8, 2360395), (10, 1888316), (20, 944158), (40, 472079), (61, 309560), (71, 265960), (109, 173240), (122, 154780), (142, 132980), (218, 86620), (244, 77390), (284, 66490), (305, 61912), (355, 53192), (436, 43310), (488, 38695), (545, 34648), (568, 33245), (610, 30956), (710, 26596), (872, 21655), (1090, 17324), (1220, 15478), (1420, 13298), (2180, 8662), (2440, 7739), (2840, 6649), (4331, 4360)]