19807120

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{157}}^1$

素因数の和:272

約数の個数: 80

約数和(自身を含む): 49371840

約数和(自身を除く): 29564720

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 83, 95, 152, 157, 166, 190, 304, 314, 332, 380, 415, 628, 664, 760, 785, 830, 1256, 1328, 1520, 1570, 1577, 1660, 2512, 2983, 3140, 3154, 3320, 5966, 6280, 6308, 6640, 7885, 11932, 12560, 12616, 13031, 14915, 15770, 23864, 25232, 26062, 29830, 31540, 47728, 52124, 59660, 63080, 65155, 104248, 119320, 126160, 130310, 208496, 238640, 247589, 260620, 495178, 521240, 990356, 1042480, 1237945, 1980712, 2475890, 3961424, 4951780, 9903560, 19807120]

約数ペア:

[(1, 19807120), (2, 9903560), (4, 4951780), (5, 3961424), (8, 2475890), (10, 1980712), (16, 1237945), (19, 1042480), (20, 990356), (38, 521240), (40, 495178), (76, 260620), (80, 247589), (83, 238640), (95, 208496), (152, 130310), (157, 126160), (166, 119320), (190, 104248), (304, 65155), (314, 63080), (332, 59660), (380, 52124), (415, 47728), (628, 31540), (664, 29830), (760, 26062), (785, 25232), (830, 23864), (1256, 15770), (1328, 14915), (1520, 13031), (1570, 12616), (1577, 12560), (1660, 11932), (2512, 7885), (2983, 6640), (3140, 6308), (3154, 6280), (3320, 5966)]