21996680

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{281}}^1$

素因数の和:414

約数の個数: 64

約数和(自身を含む): 52790400

約数和(自身を除く): 30793720

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 103, 152, 190, 206, 281, 380, 412, 515, 562, 760, 824, 1030, 1124, 1405, 1957, 2060, 2248, 2810, 3914, 4120, 5339, 5620, 7828, 9785, 10678, 11240, 15656, 19570, 21356, 26695, 28943, 39140, 42712, 53390, 57886, 78280, 106780, 115772, 144715, 213560, 231544, 289430, 549917, 578860, 1099834, 1157720, 2199668, 2749585, 4399336, 5499170, 10998340, 21996680]

約数ペア:

[(1, 21996680), (2, 10998340), (4, 5499170), (5, 4399336), (8, 2749585), (10, 2199668), (19, 1157720), (20, 1099834), (38, 578860), (40, 549917), (76, 289430), (95, 231544), (103, 213560), (152, 144715), (190, 115772), (206, 106780), (281, 78280), (380, 57886), (412, 53390), (515, 42712), (562, 39140), (760, 28943), (824, 26695), (1030, 21356), (1124, 19570), (1405, 15656), (1957, 11240), (2060, 10678), (2248, 9785), (2810, 7828), (3914, 5620), (4120, 5339)]