20998740

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{173}}^1$

素因数の和:226

約数の個数: 144

約数和(自身を含む): 71793792

約数和(自身を除く): 50795052

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 17, 20, 21, 28, 30, 34, 35, 42, 51, 60, 68, 70, 84, 85, 102, 105, 119, 140, 170, 173, 204, 210, 238, 255, 289, 340, 346, 357, 420, 476, 510, 519, 578, 595, 692, 714, 865, 867, 1020, 1038, 1156, 1190, 1211, 1428, 1445, 1730, 1734, 1785, 2023, 2076, 2380, 2422, 2595, 2890, 2941, 3460, 3468, 3570, 3633, 4046, 4335, 4844, 5190, 5780, 5882, 6055, 6069, 7140, 7266, 8092, 8670, 8823, 10115, 10380, 11764, 12110, 12138, 14532, 14705, 17340, 17646, 18165, 20230, 20587, 24220, 24276, 29410, 30345, 35292, 36330, 40460, 41174, 44115, 49997, 58820, 60690, 61761, 72660, 82348, 88230, 99994, 102935, 121380, 123522, 149991, 176460, 199988, 205870, 247044, 249985, 299982, 308805, 349979, 411740, 499970, 599964, 617610, 699958, 749955, 999940, 1049937, 1235220, 1399916, 1499910, 1749895, 2099874, 2999820, 3499790, 4199748, 5249685, 6999580, 10499370, 20998740]

約数ペア:

[(1, 20998740), (2, 10499370), (3, 6999580), (4, 5249685), (5, 4199748), (6, 3499790), (7, 2999820), (10, 2099874), (12, 1749895), (14, 1499910), (15, 1399916), (17, 1235220), (20, 1049937), (21, 999940), (28, 749955), (30, 699958), (34, 617610), (35, 599964), (42, 499970), (51, 411740), (60, 349979), (68, 308805), (70, 299982), (84, 249985), (85, 247044), (102, 205870), (105, 199988), (119, 176460), (140, 149991), (170, 123522), (173, 121380), (204, 102935), (210, 99994), (238, 88230), (255, 82348), (289, 72660), (340, 61761), (346, 60690), (357, 58820), (420, 49997), (476, 44115), (510, 41174), (519, 40460), (578, 36330), (595, 35292), (692, 30345), (714, 29410), (865, 24276), (867, 24220), (1020, 20587), (1038, 20230), (1156, 18165), (1190, 17646), (1211, 17340), (1428, 14705), (1445, 14532), (1730, 12138), (1734, 12110), (1785, 11764), (2023, 10380), (2076, 10115), (2380, 8823), (2422, 8670), (2595, 8092), (2890, 7266), (2941, 7140), (3460, 6069), (3468, 6055), (3570, 5882), (3633, 5780), (4046, 5190), (4335, 4844)]