15780700

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{199}}^1$

素因数の和:287

約数の個数: 72

約数和(自身を含む): 37671200

約数和(自身を除く): 21890500

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 61, 65, 100, 122, 130, 199, 244, 260, 305, 325, 398, 610, 650, 793, 796, 995, 1220, 1300, 1525, 1586, 1990, 2587, 3050, 3172, 3965, 3980, 4975, 5174, 6100, 7930, 9950, 10348, 12139, 12935, 15860, 19825, 19900, 24278, 25870, 39650, 48556, 51740, 60695, 64675, 79300, 121390, 129350, 157807, 242780, 258700, 303475, 315614, 606950, 631228, 789035, 1213900, 1578070, 3156140, 3945175, 7890350, 15780700]

約数ペア:

[(1, 15780700), (2, 7890350), (4, 3945175), (5, 3156140), (10, 1578070), (13, 1213900), (20, 789035), (25, 631228), (26, 606950), (50, 315614), (52, 303475), (61, 258700), (65, 242780), (100, 157807), (122, 129350), (130, 121390), (199, 79300), (244, 64675), (260, 60695), (305, 51740), (325, 48556), (398, 39650), (610, 25870), (650, 24278), (793, 19900), (796, 19825), (995, 15860), (1220, 12935), (1300, 12139), (1525, 10348), (1586, 9950), (1990, 7930), (2587, 6100), (3050, 5174), (3172, 4975), (3965, 3980)]