21270400

素因数分解:

$2^7\times 5^2\times {\mathrm{17}}^2\times {\mathrm{23}}^1$

素因数の和:81

約数の個数: 144

約数和(自身を含む): 58244040

約数和(自身を除く): 36973640

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 23, 25, 32, 34, 40, 46, 50, 64, 68, 80, 85, 92, 100, 115, 128, 136, 160, 170, 184, 200, 230, 272, 289, 320, 340, 368, 391, 400, 425, 460, 544, 575, 578, 640, 680, 736, 782, 800, 850, 920, 1088, 1150, 1156, 1360, 1445, 1472, 1564, 1600, 1700, 1840, 1955, 2176, 2300, 2312, 2720, 2890, 2944, 3128, 3200, 3400, 3680, 3910, 4600, 4624, 5440, 5780, 6256, 6647, 6800, 7225, 7360, 7820, 9200, 9248, 9775, 10880, 11560, 12512, 13294, 13600, 14450, 14720, 15640, 18400, 18496, 19550, 23120, 25024, 26588, 27200, 28900, 31280, 33235, 36800, 36992, 39100, 46240, 50048, 53176, 54400, 57800, 62560, 66470, 73600, 78200, 92480, 106352, 115600, 125120, 132940, 156400, 166175, 184960, 212704, 231200, 250240, 265880, 312800, 332350, 425408, 462400, 531760, 625600, 664700, 850816, 924800, 1063520, 1251200, 1329400, 2127040, 2658800, 4254080, 5317600, 10635200, 21270400]

約数ペア:

[(1, 21270400), (2, 10635200), (4, 5317600), (5, 4254080), (8, 2658800), (10, 2127040), (16, 1329400), (17, 1251200), (20, 1063520), (23, 924800), (25, 850816), (32, 664700), (34, 625600), (40, 531760), (46, 462400), (50, 425408), (64, 332350), (68, 312800), (80, 265880), (85, 250240), (92, 231200), (100, 212704), (115, 184960), (128, 166175), (136, 156400), (160, 132940), (170, 125120), (184, 115600), (200, 106352), (230, 92480), (272, 78200), (289, 73600), (320, 66470), (340, 62560), (368, 57800), (391, 54400), (400, 53176), (425, 50048), (460, 46240), (544, 39100), (575, 36992), (578, 36800), (640, 33235), (680, 31280), (736, 28900), (782, 27200), (800, 26588), (850, 25024), (920, 23120), (1088, 19550), (1150, 18496), (1156, 18400), (1360, 15640), (1445, 14720), (1472, 14450), (1564, 13600), (1600, 13294), (1700, 12512), (1840, 11560), (1955, 10880), (2176, 9775), (2300, 9248), (2312, 9200), (2720, 7820), (2890, 7360), (2944, 7225), (3128, 6800), (3200, 6647), (3400, 6256), (3680, 5780), (3910, 5440), (4600, 4624)]