21903225

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{419}}^1$

素因数の和:490

約数の個数: 48

約数和(自身を含む): 39372480

約数和(自身を除く): 17469255

約数列:

[1, 3, 5, 15, 17, 25, 41, 51, 75, 85, 123, 205, 255, 419, 425, 615, 697, 1025, 1257, 1275, 2091, 2095, 3075, 3485, 6285, 7123, 10455, 10475, 17179, 17425, 21369, 31425, 35615, 51537, 52275, 85895, 106845, 178075, 257685, 292043, 429475, 534225, 876129, 1288425, 1460215, 4380645, 7301075, 21903225]

約数ペア:

[(1, 21903225), (3, 7301075), (5, 4380645), (15, 1460215), (17, 1288425), (25, 876129), (41, 534225), (51, 429475), (75, 292043), (85, 257685), (123, 178075), (205, 106845), (255, 85895), (419, 52275), (425, 51537), (615, 35615), (697, 31425), (1025, 21369), (1257, 17425), (1275, 17179), (2091, 10475), (2095, 10455), (3075, 7123), (3485, 6285)]