21000994575

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{409}}^1\times {\mathrm{571}}^1$

素因数の和:1113

約数の個数: 96

約数和(自身を含む): 38386233600

約数和(自身を除く): 17385239025

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 109, 165, 275, 327, 409, 545, 571, 825, 1199, 1227, 1635, 1713, 2045, 2725, 2855, 3597, 4499, 5995, 6135, 6281, 8175, 8565, 10225, 13497, 14275, 17985, 18843, 22495, 29975, 30675, 31405, 42825, 44581, 62239, 67485, 89925, 94215, 112475, 133743, 157025, 186717, 222905, 233539, 311195, 337425, 471075, 490391, 668715, 684629, 700617, 933585, 1114525, 1167695, 1471173, 1555975, 2053887, 2451955, 2568929, 3343575, 3423145, 3503085, 4667925, 5838475, 7355865, 7706787, 10269435, 12259775, 12844645, 17115725, 17515425, 25455751, 36779325, 38533935, 51347175, 64223225, 76367253, 127278755, 192669675, 280013261, 381836265, 636393775, 840039783, 1400066305, 1909181325, 4200198915, 7000331525, 21000994575]

約数ペア:

[(1, 21000994575), (3, 7000331525), (5, 4200198915), (11, 1909181325), (15, 1400066305), (25, 840039783), (33, 636393775), (55, 381836265), (75, 280013261), (109, 192669675), (165, 127278755), (275, 76367253), (327, 64223225), (409, 51347175), (545, 38533935), (571, 36779325), (825, 25455751), (1199, 17515425), (1227, 17115725), (1635, 12844645), (1713, 12259775), (2045, 10269435), (2725, 7706787), (2855, 7355865), (3597, 5838475), (4499, 4667925), (5995, 3503085), (6135, 3423145), (6281, 3343575), (8175, 2568929), (8565, 2451955), (10225, 2053887), (13497, 1555975), (14275, 1471173), (17985, 1167695), (18843, 1114525), (22495, 933585), (29975, 700617), (30675, 684629), (31405, 668715), (42825, 490391), (44581, 471075), (62239, 337425), (67485, 311195), (89925, 233539), (94215, 222905), (112475, 186717), (133743, 157025)]