638809900

素因数分解:

$2^2\times 5^2\times {\mathrm{47}}^1\times {\mathrm{199}}^1\times {\mathrm{683}}^1$

素因数の和:943

約数の個数: 72

約数和(自身を含む): 1424908800

約数和(自身を除く): 786098900

約数列:

[1, 2, 4, 5, 10, 20, 25, 47, 50, 94, 100, 188, 199, 235, 398, 470, 683, 796, 940, 995, 1175, 1366, 1990, 2350, 2732, 3415, 3980, 4700, 4975, 6830, 9353, 9950, 13660, 17075, 18706, 19900, 32101, 34150, 37412, 46765, 64202, 68300, 93530, 128404, 135917, 160505, 187060, 233825, 271834, 321010, 467650, 543668, 642020, 679585, 802525, 935300, 1359170, 1605050, 2718340, 3210100, 3397925, 6388099, 6795850, 12776198, 13591700, 25552396, 31940495, 63880990, 127761980, 159702475, 319404950, 638809900]

約数ペア:

[(1, 638809900), (2, 319404950), (4, 159702475), (5, 127761980), (10, 63880990), (20, 31940495), (25, 25552396), (47, 13591700), (50, 12776198), (94, 6795850), (100, 6388099), (188, 3397925), (199, 3210100), (235, 2718340), (398, 1605050), (470, 1359170), (683, 935300), (796, 802525), (940, 679585), (995, 642020), (1175, 543668), (1366, 467650), (1990, 321010), (2350, 271834), (2732, 233825), (3415, 187060), (3980, 160505), (4700, 135917), (4975, 128404), (6830, 93530), (9353, 68300), (9950, 64202), (13660, 46765), (17075, 37412), (18706, 34150), (19900, 32101)]