644578040

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{251}}^1$

素因数の和:421

約数の個数: 128

約数和(自身を含む): 1596672000

約数和(自身を除く): 952093960

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 31, 38, 40, 62, 76, 95, 109, 124, 152, 155, 190, 218, 248, 251, 310, 380, 436, 502, 545, 589, 620, 760, 872, 1004, 1090, 1178, 1240, 1255, 2008, 2071, 2180, 2356, 2510, 2945, 3379, 4142, 4360, 4712, 4769, 5020, 5890, 6758, 7781, 8284, 9538, 10040, 10355, 11780, 13516, 15562, 16568, 16895, 19076, 20710, 23560, 23845, 27032, 27359, 31124, 33790, 38152, 38905, 41420, 47690, 54718, 62248, 64201, 67580, 77810, 82840, 95380, 109436, 128402, 135160, 136795, 147839, 155620, 190760, 218872, 256804, 273590, 295678, 311240, 321005, 513608, 519821, 547180, 591356, 642010, 739195, 848129, 1039642, 1094360, 1182712, 1284020, 1478390, 1696258, 2079284, 2568040, 2599105, 2956780, 3392516, 4158568, 4240645, 5198210, 5913560, 6785032, 8481290, 10396420, 16114451, 16962580, 20792840, 32228902, 33925160, 64457804, 80572255, 128915608, 161144510, 322289020, 644578040]

約数ペア:

[(1, 644578040), (2, 322289020), (4, 161144510), (5, 128915608), (8, 80572255), (10, 64457804), (19, 33925160), (20, 32228902), (31, 20792840), (38, 16962580), (40, 16114451), (62, 10396420), (76, 8481290), (95, 6785032), (109, 5913560), (124, 5198210), (152, 4240645), (155, 4158568), (190, 3392516), (218, 2956780), (248, 2599105), (251, 2568040), (310, 2079284), (380, 1696258), (436, 1478390), (502, 1284020), (545, 1182712), (589, 1094360), (620, 1039642), (760, 848129), (872, 739195), (1004, 642010), (1090, 591356), (1178, 547180), (1240, 519821), (1255, 513608), (2008, 321005), (2071, 311240), (2180, 295678), (2356, 273590), (2510, 256804), (2945, 218872), (3379, 190760), (4142, 155620), (4360, 147839), (4712, 136795), (4769, 135160), (5020, 128402), (5890, 109436), (6758, 95380), (7781, 82840), (8284, 77810), (9538, 67580), (10040, 64201), (10355, 62248), (11780, 54718), (13516, 47690), (15562, 41420), (16568, 38905), (16895, 38152), (19076, 33790), (20710, 31124), (23560, 27359), (23845, 27032)]