28191915

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{379}}^1$

素因数の和:441

約数の個数: 64

約数和(自身を含む): 54720000

約数和(自身を除く): 26528085

約数列:

[1, 3, 5, 9, 15, 19, 27, 29, 45, 57, 87, 95, 135, 145, 171, 261, 285, 379, 435, 513, 551, 783, 855, 1137, 1305, 1653, 1895, 2565, 2755, 3411, 3915, 4959, 5685, 7201, 8265, 10233, 10991, 14877, 17055, 21603, 24795, 32973, 36005, 51165, 54955, 64809, 74385, 98919, 108015, 164865, 194427, 208829, 296757, 324045, 494595, 626487, 972135, 1044145, 1483785, 1879461, 3132435, 5638383, 9397305, 28191915]

約数ペア:

[(1, 28191915), (3, 9397305), (5, 5638383), (9, 3132435), (15, 1879461), (19, 1483785), (27, 1044145), (29, 972135), (45, 626487), (57, 494595), (87, 324045), (95, 296757), (135, 208829), (145, 194427), (171, 164865), (261, 108015), (285, 98919), (379, 74385), (435, 64809), (513, 54955), (551, 51165), (783, 36005), (855, 32973), (1137, 24795), (1305, 21603), (1653, 17055), (1895, 14877), (2565, 10991), (2755, 10233), (3411, 8265), (3915, 7201), (4959, 5685)]