21209880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{281}}^1$

素因数の和:349

約数の個数: 128

約数和(自身を含む): 69439680

約数和(自身を除く): 48229800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 30, 34, 37, 40, 51, 60, 68, 74, 85, 102, 111, 120, 136, 148, 170, 185, 204, 222, 255, 281, 296, 340, 370, 408, 444, 510, 555, 562, 629, 680, 740, 843, 888, 1020, 1110, 1124, 1258, 1405, 1480, 1686, 1887, 2040, 2220, 2248, 2516, 2810, 3145, 3372, 3774, 4215, 4440, 4777, 5032, 5620, 6290, 6744, 7548, 8430, 9435, 9554, 10397, 11240, 12580, 14331, 15096, 16860, 18870, 19108, 20794, 23885, 25160, 28662, 31191, 33720, 37740, 38216, 41588, 47770, 51985, 57324, 62382, 71655, 75480, 83176, 95540, 103970, 114648, 124764, 143310, 155955, 176749, 191080, 207940, 249528, 286620, 311910, 353498, 415880, 530247, 573240, 623820, 706996, 883745, 1060494, 1247640, 1413992, 1767490, 2120988, 2651235, 3534980, 4241976, 5302470, 7069960, 10604940, 21209880]

約数ペア:

[(1, 21209880), (2, 10604940), (3, 7069960), (4, 5302470), (5, 4241976), (6, 3534980), (8, 2651235), (10, 2120988), (12, 1767490), (15, 1413992), (17, 1247640), (20, 1060494), (24, 883745), (30, 706996), (34, 623820), (37, 573240), (40, 530247), (51, 415880), (60, 353498), (68, 311910), (74, 286620), (85, 249528), (102, 207940), (111, 191080), (120, 176749), (136, 155955), (148, 143310), (170, 124764), (185, 114648), (204, 103970), (222, 95540), (255, 83176), (281, 75480), (296, 71655), (340, 62382), (370, 57324), (408, 51985), (444, 47770), (510, 41588), (555, 38216), (562, 37740), (629, 33720), (680, 31191), (740, 28662), (843, 25160), (888, 23885), (1020, 20794), (1110, 19108), (1124, 18870), (1258, 16860), (1405, 15096), (1480, 14331), (1686, 12580), (1887, 11240), (2040, 10397), (2220, 9554), (2248, 9435), (2516, 8430), (2810, 7548), (3145, 6744), (3372, 6290), (3774, 5620), (4215, 5032), (4440, 4777)]