20863220

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{349}}^1$

素因数の和:433

約数の個数: 72

約数和(自身を含む): 51949800

約数和(自身を除く): 31086580

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 61, 70, 98, 122, 140, 196, 244, 245, 305, 349, 427, 490, 610, 698, 854, 980, 1220, 1396, 1708, 1745, 2135, 2443, 2989, 3490, 4270, 4886, 5978, 6980, 8540, 9772, 11956, 12215, 14945, 17101, 21289, 24430, 29890, 34202, 42578, 48860, 59780, 68404, 85156, 85505, 106445, 149023, 171010, 212890, 298046, 342020, 425780, 596092, 745115, 1043161, 1490230, 2086322, 2980460, 4172644, 5215805, 10431610, 20863220]

約数ペア:

[(1, 20863220), (2, 10431610), (4, 5215805), (5, 4172644), (7, 2980460), (10, 2086322), (14, 1490230), (20, 1043161), (28, 745115), (35, 596092), (49, 425780), (61, 342020), (70, 298046), (98, 212890), (122, 171010), (140, 149023), (196, 106445), (244, 85505), (245, 85156), (305, 68404), (349, 59780), (427, 48860), (490, 42578), (610, 34202), (698, 29890), (854, 24430), (980, 21289), (1220, 17101), (1396, 14945), (1708, 12215), (1745, 11956), (2135, 9772), (2443, 8540), (2989, 6980), (3490, 5978), (4270, 4886)]