28921420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1$

素因数の和:104

約数の個数: 144

約数和(自身を含む): 76416480

約数和(自身を除く): 47495060

約数列:

[1, 2, 4, 5, 10, 11, 17, 19, 20, 22, 34, 37, 38, 44, 55, 68, 74, 76, 85, 95, 110, 121, 148, 170, 185, 187, 190, 209, 220, 242, 323, 340, 370, 374, 380, 407, 418, 484, 605, 629, 646, 703, 740, 748, 814, 836, 935, 1045, 1210, 1258, 1292, 1406, 1615, 1628, 1870, 2035, 2057, 2090, 2299, 2420, 2516, 2812, 3145, 3230, 3515, 3553, 3740, 4070, 4114, 4180, 4477, 4598, 6290, 6460, 6919, 7030, 7106, 7733, 8140, 8228, 8954, 9196, 10285, 11495, 11951, 12580, 13838, 14060, 14212, 15466, 17765, 17908, 20570, 22385, 22990, 23902, 27676, 30932, 34595, 35530, 38665, 39083, 41140, 44770, 45980, 47804, 59755, 69190, 71060, 76109, 77330, 78166, 85063, 89540, 119510, 131461, 138380, 152218, 154660, 156332, 170126, 195415, 239020, 262922, 304436, 340252, 380545, 390830, 425315, 525844, 657305, 761090, 781660, 850630, 1314610, 1446071, 1522180, 1701260, 2629220, 2892142, 5784284, 7230355, 14460710, 28921420]

約数ペア:

[(1, 28921420), (2, 14460710), (4, 7230355), (5, 5784284), (10, 2892142), (11, 2629220), (17, 1701260), (19, 1522180), (20, 1446071), (22, 1314610), (34, 850630), (37, 781660), (38, 761090), (44, 657305), (55, 525844), (68, 425315), (74, 390830), (76, 380545), (85, 340252), (95, 304436), (110, 262922), (121, 239020), (148, 195415), (170, 170126), (185, 156332), (187, 154660), (190, 152218), (209, 138380), (220, 131461), (242, 119510), (323, 89540), (340, 85063), (370, 78166), (374, 77330), (380, 76109), (407, 71060), (418, 69190), (484, 59755), (605, 47804), (629, 45980), (646, 44770), (703, 41140), (740, 39083), (748, 38665), (814, 35530), (836, 34595), (935, 30932), (1045, 27676), (1210, 23902), (1258, 22990), (1292, 22385), (1406, 20570), (1615, 17908), (1628, 17765), (1870, 15466), (2035, 14212), (2057, 14060), (2090, 13838), (2299, 12580), (2420, 11951), (2516, 11495), (2812, 10285), (3145, 9196), (3230, 8954), (3515, 8228), (3553, 8140), (3740, 7733), (4070, 7106), (4114, 7030), (4180, 6919), (4477, 6460), (4598, 6290)]