217519900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^2\times {\mathrm{61}}^1\times {\mathrm{211}}^1$

素因数の和:312

約数の個数: 108

約数和(自身を含む): 521961384

約数和(自身を除く): 304441484

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 61, 65, 100, 122, 130, 169, 211, 244, 260, 305, 325, 338, 422, 610, 650, 676, 793, 844, 845, 1055, 1220, 1300, 1525, 1586, 1690, 2110, 2743, 3050, 3172, 3380, 3965, 4220, 4225, 5275, 5486, 6100, 7930, 8450, 10309, 10550, 10972, 12871, 13715, 15860, 16900, 19825, 20618, 21100, 25742, 27430, 35659, 39650, 41236, 51484, 51545, 54860, 64355, 68575, 71318, 79300, 103090, 128710, 137150, 142636, 167323, 178295, 206180, 257420, 257725, 274300, 321775, 334646, 356590, 515450, 643550, 669292, 713180, 836615, 891475, 1030900, 1287100, 1673230, 1782950, 2175199, 3346460, 3565900, 4183075, 4350398, 8366150, 8700796, 10875995, 16732300, 21751990, 43503980, 54379975, 108759950, 217519900]

約数ペア:

[(1, 217519900), (2, 108759950), (4, 54379975), (5, 43503980), (10, 21751990), (13, 16732300), (20, 10875995), (25, 8700796), (26, 8366150), (50, 4350398), (52, 4183075), (61, 3565900), (65, 3346460), (100, 2175199), (122, 1782950), (130, 1673230), (169, 1287100), (211, 1030900), (244, 891475), (260, 836615), (305, 713180), (325, 669292), (338, 643550), (422, 515450), (610, 356590), (650, 334646), (676, 321775), (793, 274300), (844, 257725), (845, 257420), (1055, 206180), (1220, 178295), (1300, 167323), (1525, 142636), (1586, 137150), (1690, 128710), (2110, 103090), (2743, 79300), (3050, 71318), (3172, 68575), (3380, 64355), (3965, 54860), (4220, 51545), (4225, 51484), (5275, 41236), (5486, 39650), (6100, 35659), (7930, 27430), (8450, 25742), (10309, 21100), (10550, 20618), (10972, 19825), (12871, 16900), (13715, 15860)]